Welding Helmet ADF Controls Analog Battery Chemistry Lithium Ion Battery Life 2 500 hr Battery Type CR2032 Color Black EN379 Classification 1/1/1/2 Features Light Weight True Color Vision Grind Mode No Helmet Material Polyamide Helmet Type Auto-Darkening Includes (1) Spare Front Cover Lens (1) Storage Bag Includes Batteries Yes Lens Color Green Light State 4 Magnification No Number of Arc Sensors 2 Power Source Battery Solar Series p550